EXCERPT page containing first few paragraphs. 2017-06-26 18:59:02
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This real-world example looks at what one can expect at ISO 100 for a long exposure for astrophotography.
The resulting was dark enough to require a 5 stop push, which is the equivalent of ISO 3200. The main issue with medium format cameras for astrophotography is the lack of fast lenses. The f/2.8 of the Fujifilm GF 63mm f/2.8 was the fastest lens available as of this writing, and yet a 30 second exposure still required a 5 stop push for a fairly bright star field.
Star field, 30 seconds
Adobe Camera Raw 188.8.131.528. 5 stop push. Camera Profile = Camera Pro Neg Hi
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These systems are hugely expensive, so make the right choice for your own needs (full frame vs medium format).
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